30123072979 has 2 divisors, whose sum is σ = 30123072980. Its totient is φ = 30123072978.

The previous prime is 30123072949. The next prime is 30123073031. The reversal of 30123072979 is 97927032103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30123072979 - 2¹⁷ = 30122941907 is a prime.

It is not a weakly prime, because it can be changed into another prime (30123072949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061536489 + 15061536490.

It is an arithmetic number, because the mean of its divisors is an integer number (15061536490).

Almost surely, 2^30123072979 is an apocalyptic number.

30123072979 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123072979 is an equidigital number, since it uses as much as digits as its factorization.

30123072979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 43.

The spelling of 30123072979 in words is "thirty billion, one hundred twenty-three million, seventy-two thousand, nine hundred seventy-nine".